Breeding method of photo-thermo-sensitive genic male sterile line of quality rice

A high-quality photothermo-sensitive sterility technology, applied in botany equipment and methods, applications, plant genetic improvement, etc., can solve problems such as poor lodging resistance, and achieve strong lodging resistance, moderate maturity, and plant growth. compact effect

Active Publication Date: 2014-02-26
JIANGSU COASTAL AREA AGRI SCI RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems and deficiencies in the above-mentioned prior art. After years of experimental research, the applicant found in many hybrid breeding programs and breeding methods that the breeding of a high-quality rice photothermosensitive genetic male sterile line Method, the photothermosensitive genic male sterile line of rice wit

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  • Breeding method of photo-thermo-sensitive genic male sterile line of quality rice

Examples

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Embodiment 1

[0030] Example 1: The specific breeding process of the high-quality rice photothermosensitive male sterile line "Yan 166S" of the present invention.

[0031] (1) In 2003, "Guangzhan 63S", a high-quality, blast-resistant, high-combining ability, early-maturing medium-indica photothermo-sensitive genic male sterile line, was selected as the female parent, and the compact and resistant strain bred by the Jiangsu Institute of Agricultural Sciences was selected. Lodging, high quality, rice blast resistance, preservation number CGMCCNO.7619 intermediate material of conventional medium indica rice Yandao 229 {(Gui 99×Duoxi 1) F 9} as the male parent, crossbreeding and mating and harvesting F 1 seeds;

[0032] (2) put F 1 Seed Planting F 2 Large groups are selected and from F 2 At the beginning, in each generation, the indica photothermosensitive genic male sterile line "Guangzhan 63S" was used as a control to select the characteristics of photothermosensitive genic male sterile; ...

Embodiment 2

[0038] Example 2: A high-yield cultivation technique for breeding a high-quality two-line hybrid indica rice variety "Yanliangyou 1668" by using the combination of the high-quality rice photothermosensitivity genetic male sterile line "Yan 166S" and "Yanhui 888" bred by the present invention .

[0039] (1) Sowing at the right time and cultivating strong seedlings: According to the rice production habits in various places, the sowing period is reasonably arranged to ensure safe earing and flowering. The sowing rate of wet seedlings is 10-15kg per acre, the seeding rate of dry seedlings is 20-25kg per acre, and the seed rate for field use is 1.0-1.5kg / mu. The amount of seed used for machine-transplanted rice seedlings per mu is 1.5-2.0kg. Seedling fields should be applied with enough base fertilizer, weaning fertilizer should be applied early, long-thick tiller fertilizer should be topdressed, and grafted fertilizer should be applied, and disease, pest and weed prevention shoul...

Embodiment 3

[0044] Example 3: High-yield seed production of a high-quality two-line hybrid indica rice variety "Yanliangyou 1668" by using the combination of the high-quality rice photothermosensitive genic male sterile line "Yan 166S" and "Yanhui 888" bred by the present invention technology.

[0045] (1) Reasonably arrange the sowing time to ensure that the flowering period meets well: "Yanliangyou 1668" was produced in Yancheng, Jiangsu. The first male parent was sown at the end of April, and the second male parent was sown 10 days later than the first male parent. The female parent is sown in early June, with a time difference of 36-38 days and a leaf difference of 6.6-7.0 leaves with the first-stage male parent. Generally, the flowering period will meet well with such a time difference and leaf difference.

[0046] (2) Cultivate strong seedlings, suitable row ratio, and insert basic seedlings: Generally, when transplanting, the male parent should have 3 to 4 tillers, and the female p...

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Abstract

The invention discloses a breeding method of a photo-thermo-sensitive genic male sterile line of quality rice and belongs to the field of plant breeding technology. The method comprises steps as follows: (1) selecting the photo-thermo-sensitive genic male sterile line Guangzhan 63S as a female parent, taking intermediate material Yandao 229 of routine medium indica rice which has a tight plant type, good lodging resistance, high quality and high resistance to rice blast as a male parent, and carrying out hybridization and combining and generation-adding to harvest F1 seeds; (2) planting F1 seeds and carrying out F2 large group selection, selecting superior individuals with good photo-thermo-sensitive genic male sterile characteristic, high quality and tight plant type at each generation starting from F2. Until self-crossing for six generation namely F6 generation, the photo-thermo-sensitive genic male sterile line with tight plant type, high quality, high resistance to rice blast and early-maturing medium indica type is bred and named as Yan 166S. A new combination of two-line indica hybrid rice prepared by the above bred photo-thermo-sensitive genic male sterile line can better solve the disadvantage of poor lodging resistance of the new combination of the two-line hybrid rice prepared by the indica-type photo-thermo-sensitive genic male sterile line Guangzhan 63S.

Description

technical field [0001] The invention relates to a plant breeding method, which belongs to the technical field of plant breeding, and more specifically relates to a method for breeding high-quality rice photothermosensitive genetic male sterile lines. Background technique [0002] Rice is the main food crop in my country, and the planting area of ​​hybrid rice accounts for more than half of the rice planting area in my country. In the past ten years, my country's hybrid rice breeding research has achieved world-renowned achievements, and successively bred new super two-line hybrid rice combinations such as "Liangyou Peijiu", "Liangyou 0293", and "Y Liangyou 2", and realized my country's super The goal of the first, second and third phases of high-yield rice yield per mu indicates that my country's rice breeding and production will continue to maintain the world's leading level. However, it must also be recognized that the first, second, and third phases of my country's super ...

Claims

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Application Information

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IPC IPC(8): A01H1/02
Inventor 姚立生孙明法严国红王爱民朱国永唐红生何冲霄任仲玲刘凯张桂云施伟单忠德孙红芹万林生倪正斌
Owner JIANGSU COASTAL AREA AGRI SCI RES INST
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